backmeup (npm) - OS Command Injection via Backup Option Values (CVE-2026-71243) | HOL Guard CVE

High · CVSS 8.8CVE-2026-71243

backmeup (npm) - OS Command Injection via Backup Option Values

Answer in brief

CVE-2026-71243 records a High severity (CVSS 8.8) vulnerability in backmeup (npm) - OS Command Injection via Backup Option Values. The current sources do not mark it as known exploited. The current feed maps adaltas/backmeup (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 5, 2026Updated Aug 26, 2026Source checked Sep 19, 2026First seen by HOL Aug 5, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps adaltas/backmeup (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
adaltas/backmeupgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for adaltas/backmeup.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source description

The backmeup npm package assembles shell command strings by directly concatenating its option values (name, source, destination, filter) - e.g. cmd = "mkdir -p " + path.join(info.destination, info.name) + "; " - and executes the resulting string through a shell via ssh2-exec (locally via child_process, or remotely via SSH when an ssh handle is supplied), rather than using execFile/spawn with an argument array.

Quoted source text, attributed separately from HOL analysis.